Delta Pressure Feedback EGR by Ford Diagnostics and Repair with a Contest.mp4

[nobleheight]

There seems to be a discrepancy in specs between this video at 1:56 and another Wells video entitled "Wells Ford EGR DPFE Training with Sgt Tech P0400 P0401 P0402 " at 5:00.

According to this video, the specs are:

Late DPFE -- 0.8 to 1.2 v

Early DPFE -- 0.3 to 0.7 v

Early PFE -- 3.0 to 3.4 v

The other Wells video does not make the distinction between early and late DPFE. It only states the lower limit as 1.5 v. As you can see, none of the above specs have 1.5 v as a lower limit.

[Wellstech]

@nobleheight The early DPFE and PFE specs are correct and we did state it in the later video as well as the earlier. We found in the later video a 1.5V rule of thumb works well for all later DPFEs, hence the change in spec, just to keep it as simple as possible.

Mark Hicks

Wells Vehicle Electronics

[nobleheight]

2:53 I am trying to understand how the 3 pins of the DPFE sensor works. Correct me if I am wrong, but my current understanding is that if signal voltage is 1.0, then reference ground should be 4.0. Is that correct? Basically, the sum of signal voltage and reference ground should equal reference voltage (ignoring signs).

[Wellstech]

@nobleheight Honestly, I have never checked the connector the way you are describing. I am assuming you are back probing the pins while it is connected and trying to equate the results. This is how I check it. Disconnect the connector, turn the key "on", ground the black lead of the meter and find the pin with 5 volts. Then touch the ground lead to the other two remaining pins, if the ground is good you should read the same 5 volts.

[Wellstech]

@Wellstech Connect the connector back probe the remaining pin and read the voltage. I hope this answers your question.

Mark Hicks

Wells Vehicle Electronics